Process of coating metal.



5- brass, althou UNITED STATES, PATENT OFFICE.

HANS HINRIOH BAUMGARN, OF DAVENPORT, IOWA. PnocEss oF com-nae. METAL.

Specification of Letters Patent. Application filed November 28,1906; Serial No. 346,645.

Patented March 19, 1907.

To all whom it may concern: Be it known that I, HANS HINRICH BAUM GARN, a citizen of the United States, residing at Davenport, in the county of Scott and 5 State of Iowa, have invented certain new and useful Improvements in-Processes for Coating Metal, of which the following is a s ecification, reference being had therein to t e accom anying drawing.

'io Tl iis invention relates to a process for coating metal surfacesas, for instance, the interior of boilers or tankswith' brass, whereby scaling, rusting, and corroding of the metal is prevented. Any boiler that I 5 does not scale saves fuel. Therefore I claim this a valuable invention.

The metal to be brass-coated, such as iron or steel, must be first heated, and the heating of the metal can be either done in ajfurnace or at the time of manufacture, as it is then at I a suitable tem erature. While the metal is hot I apply a t coating of pulverized glass,

' to the eated metal and then give the glass sufficient time-to melt and coat not only the- 2 5 exposed part of the metal, but also the cracks and crevices thoroughly before the brassis.

applied. It is of great'importance to apply t e coating of lass prior toapplying the brass, becaufie b l h l fir goexperience t at y a p ing t e g ass st a ,perfect coated articlbi s produced. After the powdered glass has been applied to the I heated metal I then subject the glass-coated metal to a preparation of preferably melted I may sprinkle particles of brass u on to glass-coated metal. ever, I ave foundfrom practical experience that it is best to subject the glass-coated .I'netalto-melted brass'that is to say, the o metal, after the lass has been applied, should be thorougfi dipped in the brass in such a way as to ma e t e brass stick on the metal. face on the metal th treated, it is preferable .to subject 'the same to pressure by runhingit through rollers'after the brass has been applied ereto.

he above process of treating metal-.as,

have found from practical.

How

To obtainan'even and smooth surticularly to large quantities of material. In smaller quantities or pieces the same process may be used by placing the smaller pieces in a hot fire to heat and then after removing the metal from thefire placing the pulverized glass on the hot surface and permitting the glass to melt and fill the cracks and crevices thoroughly. Subsequently the brass is placed on this glass-coated surface in any shapeor form to get any suitable thickness of brass'on the stee or iron.

Iron and steel have crevices and cracks which should be perfectly covered by the glass to produce a perfectly brass-coated finlshed article, and this is only accomplished by glass-coating the heated metal rior to the application of the brass, so that t e glass will have time to melt and not only cover the exposed parts of the surface to be coated, but also the entire surfaces of the cracks and crevicesis applied to the lass-coated surface, the same will commingf not. only upon the metal tobe coated, but also in the crevices andcracks, thereb producing .a perfectly brass --coated artic e, the brass coating of which article has no imperfections or defects. What I claim is- I The. rocessofbrass-coatinganetal, comprising eating the metal to be coated, then ap ly ng a thin coating or covering of dry, p verized glass to the entire surface of the metal to be coated, then permitting said pulverized lass to melt n on the metal and en- .ter all oi the cracks and crevices and entirely glass-coat said cracks and crevices and outer surface, then appliing brass to the glass coated surface of t e metal while. the same is hleated, and then permitting the metal to coo In testimony whereof I hereunto aflix my signature in resence of two witnesses.

HA S HIN RICH BAUMGARN. Witnesses:

' T. L. WALES,

R. L. GUERNSEY.

for instance steel or iron"relates more par-'- -When the brass (in a liquid state) e perfectly with the glass, exposed surface of the. 

